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Assessment of health risk of trace metal pollution in surface soil and road dust from e-waste recycling area in China

机译：中国电子垃圾回收区表层土壤和道路扬尘中微量金属污染的健康风险评估

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Informal recycling of e-waste and the resulting heavy metal pollution has become a serious burden on the ecosystem in Guiyu, China. In this investigation, we evaluated the trace metals concentration of community soil and road dust samples from 11 locations in Guiyu and 5 locations (consists of residential areas, kindergarten/school and farm field) in a reference area using graphite furnace atomic absorption spectrophotometer. The study spanned four seasons, 2012–2013, with a view to assess the risk associated with e-waste recycling in the study area. The concentration of Pb, Cd, Cr and Mn were 448.73, 0.71, 63.90 and 806.54 mg/kg in Guiyu soil and 589.74, 1.94, 69.71 and 693.74 mg/kg, in the dust, respectively. Pb and Cd values were significantly higher (P≤ 0.05) than the reference area and the mixed model analysis with repeated seasonal measurements revealed soil Pb and Cd levels that were 2.32 and 4.34 times, while the ratios for dust sample were 4.10 and 3.18 times higher than the reference area. Contamination factor, degree of contamination and pollution load index indicated that all sampling points had high level of metal contamination except farm land and kindergarten compound. The cumulative hazard index of Pb, Cd, Cr and Mn for children in exposed area was 0.99 and 1.62 for soil and dust respectively, suggesting non-cancer health risk potential. The significant accumulation of trace metals in the e-waste recycling area predisposes human life, especially children, to a potentially serious health risk.
机译：电子废物的非正式回收以及由此产生的重金属污染已成为中国贵屿生态系统的沉重负担。在这项调查中，我们使用石墨炉原子吸收分光光度计评估了贵屿州11个地点和参考地区的5个地点（由居民区，幼儿园/学校和农田组成）中社区土壤和道路扬尘样品中的痕量金属浓度。该研究跨越了2012-2013年的四个季节，以评估研究区域中与电子垃圾回收相关的风险。贵屿土壤中Pb，Cd，Cr和Mn的浓度分别为尘土中的448.73、0.71、63.90和806.54 mg / kg，粉尘中的浓度分别为589.74、1.94、69.71和693.74 mg / kg。 Pb和Cd值显着高于参考区域（P≤0.05），并且通过重复季节测量的混合模型分析显示，土壤Pb和Cd含量分别为2.32和4.34倍，而粉尘样品的比率分别为4.10和3.18倍比参考区域污染因子，污染程度和污染负荷指数表明，除农田和幼儿园化合物外，所有采样点的金属污染水平都很高。暴露区域儿童的铅，镉，铬和锰的累积危害指数分别为土壤和尘埃为0.99和1.62，表明潜在的非癌症健康风险。电子废物回收区中大量痕量金属的积累使人类尤其是儿童的生命面临潜在的严重健康风险。

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